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Jordan Rose f9e9a9f41b [analyzer] Base regions may be invalid when layered on symbolic regions. 
While RegionStore checks to make sure casts on TypedValueRegions are valid,
it does not do the same for SymbolicRegions, which do not have perfect type
info anyway. Additionally, MemRegion::getAsOffset does not take a
ProgramState, so it can't use dynamic type info to determine a better type
for the regions. (This could also be dangerous if the type of a super-region
changes!)

Account for this by checking that a base object region is valid on top of a
symbolic region, and falling back to "symbolic offset" mode if not.

Fixes PR15345.

llvm-svn: 176034
 		2013-02-25 18:36:15 +00:00
..
INPUTS Revert 'Fix a typo 'iff' => 'if''. iff is an abreviation of if and only if. See: http://en.wikipedia.org/wiki/If_and_only_if Commit 164766 2012-09-27 10:16:10 +00:00
bindings Comment parsing: improve the fidelity of XML output for many block commands 2013-02-01 20:23:57 +00:00
docs Adding hasDeclaration overload for TemplateSpecializationType 2013-02-25 14:49:29 +00:00
examples Nuke SetUpBuildDumpLog. 2013-01-20 01:58:28 +00:00
include Adding hasDeclaration overload for TemplateSpecializationType 2013-02-25 14:49:29 +00:00
lib [analyzer] Base regions may be invalid when layered on symbolic regions. 2013-02-25 18:36:15 +00:00
runtime Add MSan to the list of targets in Makefile-based builds. 2013-02-21 13:59:14 +00:00
test [analyzer] Base regions may be invalid when layered on symbolic regions. 2013-02-25 18:36:15 +00:00
tools [preprocessor] Use MacroDirective in the preprocessor callbacks to make available the 2013-02-24 00:05:14 +00:00
unittests Re-add hack that caused regression. 2013-02-25 15:59:54 +00:00
utils Strip 'llvm' from 'llvm::Optional' uses. 2013-02-21 01:29:01 +00:00
www C++11 status page: 2013-02-22 09:31:00 +00:00
.arcconfig Add .arcconfig to the repository. Useful if someone wants to use phabricator's command line tool. 2012-12-01 12:08:08 +00:00
.gitignore Reverted unintendedly-committed file. 2013-01-31 19:05:31 +00:00
CMakeLists.txt CMake: Include Clang unit tests in check-clang target in standalone builds. 2013-02-08 07:28:25 +00:00
CODE_OWNERS.TXT Duplicate some common owners between Clang and LLVM. 2012-11-27 00:48:12 +00:00
INSTALL.txt Minor tweak to install docs 2013-02-05 22:01:16 +00:00
LICENSE.TXT Update the copyright coredits -- Happy new year 2013! 2013-01-01 10:00:19 +00:00
Makefile The top-level clang Makefile is #included into other Makefiles. (sigh) So we 2012-10-03 08:39:19 +00:00
ModuleInfo.txt
…
NOTES.txt Remove an uninteresting note 2013-02-05 21:13:55 +00:00
README.txt
…

README.txt 

//===----------------------------------------------------------------------===//
// C Language Family Front-end
//===----------------------------------------------------------------------===//

Welcome to Clang.  This is a compiler front-end for the C family of languages
(C, C++, Objective-C, and Objective-C++) which is built as part of the LLVM
compiler infrastructure project.

Unlike many other compiler frontends, Clang is useful for a number of things
beyond just compiling code: we intend for Clang to be host to a number of
different source level tools.  One example of this is the Clang Static Analyzer.

If you're interested in more (including how to build Clang) it is best to read
the relevant web sites.  Here are some pointers:

Information on Clang:              http://clang.llvm.org/
Building and using Clang:          http://clang.llvm.org/get_started.html
Clang Static Analyzer:             http://clang-analyzer.llvm.org/
Information on the LLVM project:   http://llvm.org/

If you have questions or comments about Clang, a great place to discuss them is
on the Clang development mailing list:
  http://lists.cs.uiuc.edu/mailman/listinfo/cfe-dev

If you find a bug in Clang, please file it in the LLVM bug tracker:
  http://llvm.org/bugs/